Wear performance of diamond coated WC-Co tools with a CrN interlayer
Wear performance of diamond coated WC-Co tools with a CrN interlayer
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DOI：
10.1016/j.diamond.2016.12.001
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发表时间：
2017-03-01
影响因子：
4.1
通讯作者：
Hoffman, Alon
中科院分区：
文献类型：
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作者：
Chandran, Maneesh;Sammler, Fiona;Hoffman, Alon
本文研究了以CrN为中间层的金刚石涂层WC-Co刀具切削铝硅合金时的磨损性能。采用热灯丝化学气相沉积技术在WC-6%Co（Arno）和WC-10%Co（Sandvik）基体上沉积金刚石薄膜，并添加CrN中间层。通过压痕技术进行的附着力评估表明，在196 N的载荷下，任何基材上的金刚石涂层都没有严重的分层。使用拉曼光谱成像的靠近压痕标记的区域的应力场图像示出了一阶拉曼线的分裂以及峰值位置向更高频率的偏移。金刚石/CrN/WC-6%Co刀具对Al-Si合金（AlSi 17 Cu 4 Mg）工件的切削试验表明，在t（c）= 960 s时，其磨损性能为VBmax = 0.1 mm，但在冲击试验中，其磨损性能并不高。另一方面，金刚石/CrN/WC-10%Co刀具与Al-Si合金工件的加工实验显示出优异的磨损性能（t（c）= 960 s时VBmax = 0.17 mm），以及改善的涂层-基底界面疲劳强度。采用压痕、车削和冲击试验的综合研究表明，在具有CrN中间层的WC-10%Co基体上的金刚石涂层对于加工Al-Si合金和其他高冲击应用具有潜在的优势。(C)© 2016 Elsevier B. V.版权所有。
In this paper we report the wear performance of diamond coated WC-Co cutting tools with a CrN interlayer by machining Al-Si alloys. Diamond films were deposited on both WC-6%Co (Arno) and WC-10%Co (Sandvik) substrates with a CrN interlayer using the hot filament chemical vapor deposition technique. Adhesion assessment by the indentation technique shows that there was no major delamination of diamond coatings on any substrate at a load of 196 N. The stress field image of the region close to the indentation marks using Raman spectral imaging shows the splitting of the first order Raman line as well as a shift in the peak position to a higher frequency. Machining experiments of diamond/CrN/WC-6%Co tools with the Al-Si alloy (AlSi17Cu4Mg) workpiece shows a wear performance of VBmax = 0.1 mm at t(c) = 960 s, however, their performance in impact tests was not as high. On the other hand, machining experiments of diamond/CrN/WC-10%Co tools with an Al-Si alloy workpiece showed an excellent wear performance (VBmax = 0.17 mm at t(c) = 960 s), alongside an improved coating-substrate interface fatigue strength. A combined study using indentation, turning and impact tests demonstrates the potential advantage of diamond coatings on WC-10%Co substrates with a CrN interlayer for machining of Al-Si alloys and other high impact applications. (C) 2016 Elsevier B.V. All rights reserved.